Manufacturer description: The Sony FE 50mm F1.8 is an inexpensive standard prime for the company's full-frame lineup. It can be used with Sony's APS-C cameras as well, with an equivalent focal length of 75mm. The lens has 6 elements in 5 groups, with one aspherical element. The lens has a 7-blade aperture and a minimum focus distance of 0.45m.